Cable tray rung



FIG. 1 is a perspective view of a cable tray rung showing my new design;

FIG. 2 is an enlarged front elevational view of the rung of FIG. 1, therear elevational view being identical thereto;

FIG. 3 is a top plan view of the rung of FIG. 1, the bottom plan viewbeing identical thereto; and,

FIG. 4 is a right end view of the rung of FIG. 1, the left end viewbeing identical thereto.

The ornamental design for a cable tray rung, as shown and described.